SNAU318 June   2025 LMX1205

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Additional Images
    2. 2.2 Jumper Information
    3. 2.3 Multiplier Lock Detect Jumper
    4. 2.4 Setup
      1. 2.4.1 Evaluation Setup Requirement
      2. 2.4.2 Connection Diagram
    5. 2.5 Power Requirements
    6. 2.6 Reference Clock
    7. 2.7 Output Connections
    8. 2.8 Test Points
  7. 3Software
    1. 3.1 Software Description
    2. 3.2 Software Installation
    3. 3.3 USB2ANY Interface
  8. 4Implementation Results
    1. 4.1 Buffer Mode
    2. 4.2 Multiplier and Divider Modes
    3. 4.3 Logic Clock
    4. 4.4 Programmable Delay
  9. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  10. 6Additional Information
    1. 6.1 Trademarks

1.4 Device Information

The wide frequency range and ultra low additive jitter of the LMX1205 can be used as a 1:4 fan-out buffer to clock multiple high precision and high frequency data converters. Each of the four high-frequency clock outputs and additional LOGICLK output with larger divider range is paired with a SYSREF output clock signal. The SYSREF signal for JESD interfaces are either internally generated or buffered in as an input and re-clocked to the device clocks. For data converter clocking applications, verify that the jitter of the clock is less than the aperture jitter of the data converter. In applications where more than four data converters are clocked, use multiple devices to distribute all the high-frequency clocks and SYSREF signals required to develop a multitude of cascading architectures. With low jitter and noise floor, LMX1205MSEVM combined with an ultra-low noise reference clock source is designed for clocking data converters, especially when sampling above 3GHz.